You are probably right about IBrowse 1.22, I actually made a mistake thinking I was using 1.22 all this time, but it's only 1.2. So it's actually IBrowse 1.2 that comes for free on Aminet CD 24, not 1.22. Unfortunately I can't find 1.22 or an update online anywhere, although it definitely was the last 1.x version.
The problem people are most-likely having with AWeb crashing are the Datatypes they're using. Do some tests to see which type of images are causing the crashes (JPEG/GIF/PNG) and try some replacement Datatypes for those.
I set up IBrowse 1.22 on my A600 a few years ago, and yes, it was VERY hard to find the patches. I believe I finally got them from an Amiga Format or CU Amiga cover CD, either directly or through an offline mirror of HiSoft/Omnipresence's website. I'm pretty sure I saved the files, but unfortunately that A600 is not nearby at the moment.
ISOs of the cover CDs can be found fairly easily online...
